condition mean min max ZT0-3 0.0453745 0.0 0.090749 ZT4-7 0.0 0.0 0.0 ZT8-11 0.0 0.0 0.0 ZT12-15 0.012001225 0.0 0.02400245 ZT16-19 0.0169455 0.0 0.033891 ZT20-23 0 0 0